Diffuse Reflectance Spectrum of tris-Neodymium Sulfate

AbstractHematite exists ubiquitously in soils and sediments, and is commonly aluminium (Al)-substituted. This study investigated systematically the effects of Al substitution on the visible diffuse reflectance spectrum (DRS) of hematite by using several sets of synthetic samples. We found that the position and amplitude of the characteristic absorption band of hematite (estimated from the first- and second-order derivative curves of the Kubelka-Munk remission function spectrum derived from the DRS) was significantly affected by the degree of Al substitution as well as by sample grain morphology. Therefore, there are ambiguities in quantifying the degree of Al substitution and the mass concentration of hematite using DRS. Nevertheless, if hematite forms under similar environmental conditions, it is possible to establish a transfer function between the DRS parameters and hematite concentration as discussed here for a Chinese loess-palaeosol sequence.

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Diffuse reflectance spectrum of some Nd3+ aromatic acids

Solid State Communications ◽

10.1016/0038-1098(74)90664-4 ◽

1974 ◽

Vol 15 (5) ◽

pp. 787-789

Author(s):

S.P. Tandon ◽

P.P. Vaishnava ◽

R.C. Mathur

Keyword(s):

Diffuse Reflectance ◽

Reflectance Spectrum ◽

Diffuse Reflectance Spectrum ◽

Aromatic Acids

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Diffuse reflectance spectrum of Co3+-N-acetylacetone-anthralinic acid complex

Solid State Communications ◽

10.1016/0038-1098(74)90847-3 ◽

1974 ◽

Vol 14 (3) ◽

pp. 257-258

Author(s):

S.P. Tandon ◽

K.K. Sule

Keyword(s):

Diffuse Reflectance ◽

Reflectance Spectrum ◽

Diffuse Reflectance Spectrum ◽

Acid Complex

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Measurement of Diffuse Reflectance Spectrum of Biological Material with Single Integrating-Sphere

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.321.252 ◽

2011 ◽

Vol 321 ◽

pp. 252-255

Author(s):

Lian Shun Zhang ◽

Lei Fu ◽

Kong Yang Zhao

Keyword(s):

Biological Material ◽

Diffuse Reflectance ◽

Reflectance Spectrum ◽

Diffuse Reflectance Spectrum ◽

Experimental System ◽

Integrating Sphere ◽

Light Sources ◽

Human Breast ◽

Human Breast Tissue ◽

Halogen Light

Detection of interactions between light and biological material can be used to characterize the optical properties of the biological material. The purpose of this paper is to develop a method that measures the diffuse reflectance spectrum of biological material with single integrating-sphere. The experimental system incorporated a DH-2000 Deuterium Tungsten Halogen Light Sources, USB4000-VIS-NIR Miniature Fiber Optic Spectrometer and an integrating-sphere. Intralipid and ink were used to mimic scattering and absorbing properties of biological material in the tested sample. Total of 30 sample representing of normal and malignant human breast tissue were measured. The measured optical reflectance spectrums with different scattering and absorbing properties were analyzed. The result showed that the diffuse reflectance spectrums of normal and malignant biological material are different in intensity.

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Spectrophotometric Studies on Sb(III) in Hydrochloric Acid Solutions

Canadian Journal of Chemistry ◽

10.1139/v75-123 ◽

1975 ◽

Vol 53 (6) ◽

pp. 888-893 ◽

Cited By ~ 7

Author(s):

John Milne

Keyword(s):

Raman Spectrum ◽

Hydrochloric Acid ◽

Diffuse Reflectance ◽

Reflectance Spectrum ◽

Diffuse Reflectance Spectrum ◽

Equilibrium Mixture ◽

Ultraviolet Spectroscopy ◽

Acid Solutions ◽

Hydrochloric Acid Solutions ◽

Solubility Studies

Ultraviolet spectroscopy confirms the findings of solubility studies that Sb(III) in 3–12 M hydrochloric acid solutions is present as an equilibrium mixture of SbCl4− and SbCl63− ions. In the presence of H2SO4 a further equilibrium with the SbCl3(HSO4)− ion is found. The spectrum of the SbCl63− ion in solution is unlike the diffuse reflectance spectrum of this anion in Co(NH3)6SbCl6 but is similar to that in K3SbCl6. The Raman spectrum of 2 M SbCl3 in 2.8 M hydrochloric acid is shown to be due to the SbCl4− ion and the spectrum is assigned under C2υ symmetry. The Raman spectrum of the SbCl63− ion in solution is discussed.

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Adsorption-Photometric and Test-Determination of Fe(III) in Natural Water Using Silica Lyer-by-Lyer Modified with Polyhexamethylene Guanidine and Ferron

Journal of Siberian Federal University Chemistry ◽

10.17516/1998-2836-0188 ◽

2020 ◽

pp. 349-362

Author(s):

Svetlana L. Didukh-Shadrina ◽

Olga V. Buyko ◽

Vladimir N. Losev

Keyword(s):

Natural Water ◽

Mineral Water ◽

Diffuse Reflectance ◽

Reflectance Spectrum ◽

Diffuse Reflectance Spectrum ◽

Photometric Determination ◽

Test Method ◽

Test Determination ◽

Polyhexamethylene Guanidine

Silica based adsorbent sequentially modified with polyhexamethylene guanidine and 7-iodine-8-hydroxyquinoline-5-sulfonic acid (Ferron) was proposed for adsorption-photometric and test-determination of Fe(III) in natural water. During adsorption of Fe(III) from solutions with pH 2.0-3.5 adsorbent became green colored. Formation of green-colored surface complex of Fe(III) with Ferron with the maximum in diffuse reflectance spectrum at 600 nm was used for developing the procedure of its adsorption-photometric determination. Detection limit calculated by 3s-criterion was 0.03 μg/0.1 g of adsorbent (3 μg/L if the adsorption was carried out from 10 mL of solution); the analytical range was 10 – 220 μg/L. Test-method was proposed for quick visual determination of Fe(III) in natural water in the variant of test-scale. Developed procedures were tested for determination of iron in natural river water of Krasnoyarskii kray and mineral water “Zagorie”

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